Bidens beckii (Beck's water-marigold) is a species of flowering plant in the daisy family. It is native to Canada and the northern United States.Bidens beckii is an annual herb sometimes as much as to 200 cm (80 inches) tall. It produces numerous yellow flower heads containing both disc florets and ray florets. It grows emerging from stagnant or slow-moving water, with some of the leaves completely under water.
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